Lisa Simpson
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Lisa Marie Simpson is a character in the animated television series The Simpsons. The person who does the voice for the character is Yeardley Smith. Matt Groening, the creator of the series, named her after his sister. She is the oldest daughter and middle child of Homer and Marge Simpson, and the sister of Bart and Maggie.
Lisa is a very intelligent 8 year old girl. She is one of the most intelligent characters on the series, with an I.Q. of either 156 or 159. She also plays the saxophone. Despite her cleverness Lisa has typical childhood issues. In the episode "Lost Our Lisa" she gets lost after riding the bus alone